Mold-forming apparatus



J. (LPELTON.

4 MOLD FORMING APPARATUS.

APPLICATION FILED JULY 12, 1920.

Patented Mar. 14, 1922.

Icy-

INVENTOR Jbhz CPeZ-Zmz ATTORNEY UNITED stares PATENT GFFECE.

JOHN C. PELTON, or SIERRA MADRE, oALIroRNm.

MOLD-FORMING APPARATUS.

To. all whom it may concern. I

Be it known that I, JOHN C. PELTON, a citizen of the United States,residing at Sierra .Madre, in the county'of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Mold-FormingApparatus, of which the following is a specification. j i

My invention relates to apparatus for formingmolds, especially adapted vfor the vide means whereby the molded article may be efliciently ejectedfrom the mold without materiallydestroying or effecting the moldingmaterial forming the same, whereby the same molding material and moldmay be used over again for the casting of subsequent articles.

Other objects will appear. in the following description, will be ointedout .in the claims and will be embo ied in the accompanying drawings, inwhich:

Fig. l is a plan view of the apparatus embodying my invention, showing aplurality of patterns projected into a flask and the molding materialpacked therearound.

Fig.2 is a vertical section of the same taken on the line 2-2 of Fig. 1.

Fig. 3 is a transverse plan section of the same taken on the line 3+3 ofFig. 2. V

Fig. 4 is a section similar to Fig. 2, showing the pattern removed fromthe flask, and the concrete casting material poured into the moldsformed thereby.

In carrying out my invention, 10 represents a tank formed of anysuitable material over the top of which is mounted a plate 11,

which is provided with a lurality of circular perforations 12 of adiameter equal to the outside diameter of the pipes to be cast. Aplurality of standards 18, which are centrally disposed with respect tothe perforations 12, are secured to the bottom of 1920. Serial No.395,515.

Specification of LettersPatent. Patented lua 14 1922 Application filed Zfuly 12, a

tank 10, and projectupwardly in said tank. and have mounted on theirupper ends the, circular disc members 14 which are disposed on a levelwith the plate. 11 and are of a diameter equal tothe inside diameterofthe pipes 'to be cast. By this construction it will be seen that ring;like apertures 15- are formedbetween the wallsofthe perforations 12andtheperipheral edges'of the disc membersll.

Mounted above theplate 11 is a flask 16, which is secured to said plateandthetank 10 by means of the angle. irons '17, and mounted in the tank10 is a hollow float member 18 adapted to slide .on the standards 13 andto be guided thereby.

Mounted on the upper surface of the float l8 and secured thereto is aplurality of cyli-ndrical patterns 19, of the size and shape of thearticle to be cast which are adapted to project through the ring likeapertures 15.

The tank 10 is made water tight and is provided with liquid inlet andoutlet pipes 20 and 21 having cut-off valves 22 and 23.

In operating the apparatus, water or other liquid is admitted into thetank 10 through the pipe 20 which causes the float 18 to rise andproject the pattern members 19 through the ring likeapertures 15 up intothe flask 16, as clearly shown in Fig. 2 of the drawings. The flask 16is then filled with moist sand or other suitable molding material 24which becomes packed around the pattern members. After the same hasbecome sufficiently set the liquid is withdrawn from the tank 10 throughthe pipe 21, which allows the float 18 todescend by force of gravity andwithdraw the patterns from the flask 16 as shown in Fig. 4:, thusforming molds in the sand intowhich the cement mixture 25 may be pouredin the usual manner.

After the cement mixture has become sufliciently set the moldingmaterial may be pumped into an adjacent flask or otherwise removed fromthe flask and the finished product taken from the flask; or liquid mayagain be admitted into the tank, thus causing the pattern member to riseand push the products upwardly and out of the mold, thus preserving themold for future castings.

It will be obvious that without departing from the spirit of myinvention the, gnold may be formed permanently in the flask 16 of somesolid material, such as wood or metal and the pattern member used merelyto eject the finished article from such mold. l

What I claim is:

1. An apparatus of the class described,

comprising a flask, a tank mounted below said flask, a float mounted insaid tank, a pattern secured to said float, and means for lifting andlowering said float whereby said pattern may be projected into and outof said flask.

2. An apparatus of the class described, comprising a; flask, a bottomfor said flask provided with an aperture the walls of which being of acontour equivalent to the outer cross sectional shape of an article tobe molded, a'plate supported independently of said bottom disposedwithin said aperture of a contour equivalent to the internal crosssectional shape; of said article, and a float means for'projecting'apattern of the shape of said article through the space formed betweenthe walls of the aperture in said bot,- tom and v the edges of saidplate, into and out of said: flask.

partment to cause a withdrawal of the pat tern from the moldingcompartment when the molding operation has been completed.

In witness that I claim the foregoing I have hereunto subscribed my namethis 2nd day of July, 1920. l

J C. PE'LTON.

